Enhancing CAR-NK persistence to unlock its full therapeutic potentials

Area of Science:

• Immunotherapy
• Cellular Therapy
• Oncology

Background:

• Chimeric Antigen Receptor-Natural Killer (CAR-NK) cell therapy is a promising immunotherapy.
• Poor persistence of CAR-NK cells is a significant barrier to their therapeutic efficacy.
• Enhancing CAR-NK cell persistence is vital for successful treatment outcomes in various cancers.

Purpose of the Study:

• To review the underlying causes of limited CAR-NK cell persistence.
• To summarize current strategies aimed at improving CAR-NK cell persistence.
• To discuss the application of these strategies in hematologic malignancies and solid tumors.

Main Methods:

• Literature review of studies on CAR-NK cell persistence.
• Categorization of strategies based on their mechanisms of action.
• Analysis of the impact of different strategies on CAR-NK cell survival and function.

Main Results:

• Identified key factors contributing to poor CAR-NK cell persistence.
• Highlighted diverse strategies including cytokine support, optimized cell sources, CAR design modifications, checkpoint disruption, metabolic reprogramming, lymphodepletion, and evasion of allo- and fratricide.
• Demonstrated the potential of these strategies to enhance *in vivo* persistence.

Conclusions:

• Multiple approaches can significantly improve CAR-NK cell persistence.
• Enhanced persistence is expected to translate into improved therapeutic efficacy for CAR-NK cell therapy.
• Further research into these strategies will advance CAR-NK cell therapy for hematologic and solid tumors.